Air-cleaning ventilator



A. c. BENNETT.

AIR CLEANING VENTILATOR.

m g a Mm H 7 h W5 M #4 m q m 2/ E APPLICATION FILED SEPT- 4,1517.

' the dust or other solid impurities from the UNITED. srarss ASHLEY C. BENNETT, OF MINNEAPOLIS, MIN 'NESOTA.

AIR-CLEANING- VENTILATOR.

Specification of Letters Patent.

Patented June 1, 1920.

Application filed September 4, 1917. Serial No. 189,448.

To all whom it may concern:

Be it known that I, AsHLEY a citizen of the United States, res1d1ng at Minneapolis, in the county of Hennepin' and State of Minnesota, have invented certain new and useful Improvements in Air- Cleaning Ventilators, of which the followin is a specification.

y invention relates to air cleaning ventilators for street cars, railroad cars and other types of closed carriers of passengers wherein it is desirable to introduce fresh air freed from dust, cinders, soot and the like. It is the object of my invention to provide a device which may be readily attached to any exposed portion of a pas.- senger carriage such as a street car or railroad car and will operate to cause currents of air to travel through the same and into the, car, the currents of air in traveling through the device being caused to move in a certain manner in reference to dead airspaces within the device so as to separate air and collect the same within thedevice, delivering pure dust-free air into the car.

In carrying out my invention I provide a dust vcollector embodying a substantially cylindrical chamber with dead air dust collecting spaces at the lower portion of' the same and a dust receptacle below said spaces. This receptacle is attached to the side of the car and has an air passageway which passes through the wall of the car and is adaptedto deliver air into the car.- These ventilators may be made relatively small and a separate ventilator applied to each berththereby insuring an abundance of fresh and perfectly clean air. Theair cleaner itself is provided with a projection which forms a mouth extended in the direction of movement of the train so that movement of the device through the air by the train will cause the air to enter the cleaner and circulate through the same, there discharging its contents and dust andsolid impurities and going from the cleaner into the car in a purified condition. a

The full objects and advantages of my invention will appear in connection with the detailed description thereof andare particularly pointed out in the claims.

In the drawings, illustrating the application of my invention in one form,

Figure 1 1s a sectional elevation new of my mventlon showmg the same in pos1t1on at C. BENNETT,

the side of a'car wall. Fig. 2 is a section on line 2--2 of Fig. 1. Fig. 3'is a part sectional plan View showing a modification of the structure illustrated in Fig. 2.

As illustrated, a casing 10 preferably cylindrical in form, is secured in any desired manner upon the side of a wall 11 of a car. This casing is provided with a top 12 through the center of which extends a pipe 13 reaching to a point indicated at 14 well within the chamber 15 formed by casing 10. The pipe 13 is curved, as indicated at 16 passing through the wall of the car as indicated at 17 where it is provided with a damper 18 by means of which the flow of air can be regulated. To the bottom portion ofcasing 10 is secured a conical extension 19 having a mouth 20 at its center to which is secured a removable receptacle 21. A trough-like member 22 extends spirally within the casing 10 forming a spiral passageway 23. The upper end of the trough is closed at 2 adjacent an opening 25 through the casing 30 ing through the air to provide an open mouth 31 turned toward the direction of travel, through which the air is forced by the movement of the device through the air causing it to enter the chamber 32 formed by the projection 26 and pass through spiral passageway 23 discharging in a spiral direction withln chamber 15 in casing 10 at a point near the bottom of said casing, as

indicated at 33. At this point a cone 34 extends upwardly within the casing above vertical partitions ,35below the cone and so that the lower edge of the 'cone is spaced, as

indicated at 36, from the walls of casing 19. In the modified form shown in Fi 3 a vertical partition 37 extends from a inge point 30 of the double door 27 toward the I opening 25 into spiral passageway 23. At 05 a point 38 on said partition 37 a swinging door 39 is pivoted, which door is adapted in one position to engage a stop 40 on the inside of trough 22. The door 39 is also adapted to en age the casing 10 as-indicated at 4=1. he interior of extension 26 I is thus divided into two passageways which receive air from themouth 31 formed by door 29 or 28 according to the d1rect1on in which the car is moving and conducts the .purities in the air ultimately to settle through annular opening 36 and into dead air spaces below cone 34 and finally gravitate to the removable receptacle 21. A stream of pure air regulated by damper 18 will be forced through the pipe 17 within the berth or other part of the car, as may I be desired. Substantially all impurities will be removed from the air.

I claim:

1. In combination with a car and the wall thereof, a casing secured to said wall embodying a gravity dust collector, a pipe leading from within said casing through the wall to the interior of the car, means earned by thecasing for causing currents of air to travel into the same by reason of the movement of the car through the air, and a trough-like member extending spirally within the inclosure formed by said casing to form an inclosed spiral passageway for conducting air from said means to the bottom of said casing.

the air to cause currents of air to travel into the same, and a trough-like member extending spirally within the inclosure formed by said casing to form an inclosed spiral passageway -for conducting air from said mouth to the bottom part of said casing.

3. In combination with a car and the wall thereof, a cylindrical casing secured to said wall, a pipe leading from the central portion of the top of said casing through the wall into the interior of the car, means carried by said casing for causing currents of air'to travel into the same by reason of the movement of the car through the air, a trough like member extending spirally within the inclosure formed by said casing to form an inclosed spiral passageway for conducting air from said means to the bottom part of said casing, and means at the bottom of said casing for providing a dead air space for the reception of dust which passes with the air through said inclosed spiral passageway.

In testimony whereof I hereunto aflix my signature.

ASHLEY C. BENNETT. 

